LCD screen
A laptop screen also known as LCD screen displays an image generated by the laptop video card. The LCD screen receives data signal from the video card through the LCD cable.
Laptop screens come in many different sizes and resolutions. In order to find the LCD screen size (in inches), you’ll have to measure the screen between the two diagonal corners.
Older laptops had mostly full screen LCD displays. Newer laptops have mostly widescreen LCD displays.
A backlight lamp (also known as CCFL bulb) is the main source of light in any LCD screen. The backlight lamp powers up by the inverter board.
The LCD screen mounts inside the laptop display panel between the screen bezel and display cover. The LCD screen is attached to the screen brackets (display brackets) which are permanently attached to the display hinges.
TYPICAL LCD SCREEN RELATED FAILURES
On the following images you’ll see some typical LCD screen related failures.
1. You can see image only on a part of the LCD screen. For example, only the top side of the screen works properly.
2. There is one or more thin multi color lines running down the screen.
3. There is a wide band running down the LCD screen. The
BUYING A NEW REPLACEMENT SCREEN
The LCD screen is one of the most expensive parts in a laptop computer. If your screen is damaged and you decide to replace it yourself, you’ll have to make sure to purchase a new screen compatible with your laptop. Hear are a few things to consider before buying a new screen:
1. Screen size.
2. Some laptops come with full size LCDs. Some laptops come with widescreen LCDs.
3. LCD screen could be matte or glossy.
4. Same size LCD screens may have different resolutions.
The best way to find a new replacement screen would be using the manufacturer’s part number or LCD screen model. Both could be found on the back side of the screen.
Need spare parts for your laptop?
If you are looking for spare parts for your laptop you can find brand new and used parts here. Just search by the part name and laptop model.
February 20th, 2010 at 9:49 pm
Margie,
If these two laptops are absolutely identical, I would try moving the hard drive and memory first. It’s easier than replacing the display panel.
February 15th, 2010 at 10:03 am
I have two older identical HP Pavilion laptops model N5310. One has a non functioning display,using an external monitor, it runs pretty well with Windows XP Professional and has decent amount of RAM (512 meg). The other one has a working display, runs Windows XP Home edition, but it has less RAM (256 Meg) so it runs slower than the non functioning display one. Which would be the better,and/or easier course of action?:
1) swap the entire LCD display portion from the good slower model to the faster dead display model? (how would I do this?)
2) swap the hard drive and RAM from the dead display model to the functioning display model?
I know these are old and not worth spending money on, but I still hope to get at least one of them in full operating condition if possible.
Thanks for any help you can offer.
December 28th, 2009 at 11:43 pm
Missy,
What was wrong with the old screen?
Here are a few things you can try:
1. Enter the BIOS setup menu and load default settings. Safe them and restart the laptop.
2. Try reflashing/updating the BIOS.
If nothing helps, I think your new LCD screen either bad or not compatible with the laptop.
December 28th, 2009 at 11:14 pm
I replaced the LCD screen on my HP DV6000. Seemed to go smoothly and I’m getting a clear picture, but the picture is all wrong. It’s moved positions to the left and I’m getting four images on one screen (similar to how the desktop background is “tiled”). Any ideas?
December 14th, 2009 at 9:23 pm
How do you locate the lid closed switch on a sony vaio vgn sz390p. My lcd went dark on me two weeks ago. i replaced the entire lcd for over $500 and its really dim but if i shine a light on it I can see the screen. I can hook up an external monitor and its perfect. I think my lid closed switch is stuck. Where can i find this?
December 9th, 2009 at 1:14 pm
My problem is a little different. After turning on the unit and heating up for 10 minutes, I get a small semi-circular black spot that appears in the lower right hand corner of the screen. It appears as about the size of a thumb print. It will remain and after the unit runs for additional 10 minutes or so, the screen will start to “flicker” and become distorted. I have not just left it on to see if it will go totally black. After shutting off and cooling then restarting, the screen is clear until it warms up again. Would this be the inverter or a screen problem?
November 26th, 2009 at 1:28 pm
Ed,
I doubt that your problem is related to the lid close switch. The LCD coming on for a second when the lid switch is tapped, it means the switch works.
Sounds like a problem with the inverter or backlight lamp.
If the lid close switch is soldered to the motherboard, you cannot disable it.
November 19th, 2009 at 12:59 pm
I believe that the dealer was reputable. With the screen coming on for a second when the lid swith is tapped it seems that the problem is in the switch. Any way to disable the lid switch? It is soldered to the mother board.
Thanks
Ed
November 19th, 2009 at 8:19 am
Ed,
Did you buy spare parts from a reputable seller? There is a chance that your spare parts are not good. I’ve seen it happening before.
The lid close switch itself could be bad I guess.